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Jun 26, 2018
06/18

by
Postlethwaite, Pete

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279 pages, [24] pages of plates : 24 cm

Topics: Postlethwaite, Pete, Postlethwaite, Pete, Postlethwaite, Pete, Actors -- Great Britain --...

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Jul 2, 2020
07/20

by
Postlethwaite, Pete

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296 pages, 24 unnumbered pages of plates (large print) : 25 cm

Topics: Postlethwaite, Pete, Actors -- Great Britain -- Biography, Large type books, Biography, Actors,...

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Jul 20, 2013
07/13

by
Claire M. Postlethwaite

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The Pyragas method of feedback control has attracted much interest as a method of stabilising unstable periodic orbits in a number of situations. We show that a time-delayed feedback control similar to the Pyragas method can be used to stabilise periodic orbits with arbitrarily large period, specifically those resulting from a resonant bifurcation of a heteroclinic cycle. Our analysis reduces the infinite-dimensional delay-equation governing the system with feedback to a three-dimensional map,...

Source: http://arxiv.org/abs/0804.2903v2

This volume was digitized and made accessible online due to deterioration of the original print copy.

Topic: Nitrogen--Fixation

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Jun 29, 2018
06/18

by
Peter Ashwin; Claire Postlethwaite

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Attractors of dynamical systems may be networks in phase space that can be heteroclinic (where there are dynamical connections between simple invariant sets) or excitable (where a perturbation threshold needs to be crossed to a dynamical connection between "nodes"). Such network attractors can display a high degree of sensitivity to noise both in terms of the regions of phase space visited and in terms of the sequence of transitions around the network. The two types of network are...

Topics: Nonlinear Sciences, Adaptation and Self-Organizing Systems

Source: http://arxiv.org/abs/1602.06135

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Sep 22, 2013
09/13

by
Peter Ashwin; Claire Postlethwaite

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Robust heteroclinic networks are invariant sets that can appear as attractors in symmetrically coupled or otherwise constrained dynamical systems. These networks may have a very complicated structure that is poorly understood and determined to a large extent by the constraints and dimension of the system. As these networks are of great interest as dynamical models of biological and cognitive processes, it is useful to understand how particular graphs can be realised as robust heteroclinic...

Source: http://arxiv.org/abs/1302.0984v1

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Dec 18, 2013
12/13

by
Postlethwaite, Diana, 1950-

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Bibliography: p. [267]-274

Topics: Eliot, George, 1819-1880, Eliot, George, 1819-1880, English literature, Philosophy, English,...

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Jun 27, 2018
06/18

by
Peter Ashwin; Claire Postlethwaite

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We give a constructive method for realizing an arbitrary directed graph (with no one-cycles) as a heteroclinic or an excitable dynamic network in the phase space of a system of coupled cells of two types. In each case, the system is expressed as a system of first order differential equations. One of the cell types (the $p$-cells) interacts by mutual inhibition and classifies which vertex (state) we are currently close to, while the other cell type (the $y$-cells) excites the $p$-cells...

Topics: Adaptation and Self-Organizing Systems, Nonlinear Sciences

Source: http://arxiv.org/abs/1506.03212

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Sep 19, 2013
09/13

by
Claire M. Postlethwaite; Mary Silber

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Previous work has shown that Benjamin-Feir unstable traveling waves of the complex Ginzburg-Landau equation (CGLE) in two spatial dimensions cannot be stabilized using a particular time-delayed feedback control mechanism known as `time-delay autosynchronisation'. In this paper, we show that the addition of similar spatial feedback terms can be used to stabilize such waves. This type of feedback is a generalization of the time-delay method of Pyragus (Phys. Letts. A 170, 1992) and has been...

Source: http://arxiv.org/abs/nlin/0701007v2

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Sep 21, 2013
09/13

by
Claire M. Postlethwaite; Mary Silber

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For many years it was believed that an unstable periodic orbit with an odd number of real Floquet multipliers greater than unity cannot be stabilized by the time-delayed feedback control mechanism of Pyragus. A recent paper by Fiedler et al uses the normal form of a subcritical Hopf bifurcation to give a counterexample to this theorem. Using the Lorenz equations as an example, we demonstrate that the stabilization mechanism identified by Fiedler et al for the Hopf normal form can also apply to...

Source: http://arxiv.org/abs/0706.3687v2

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Sep 23, 2013
09/13

by
Genevieve Brown; Claire M. Postlethwaite; Mary Silber

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We show that Pyragas delayed feedback control can stabilize an unstable periodic orbit (UPO) that arises from a generic subcritical Hopf bifurcation of a stable equilibrium in an n-dimensional dynamical system. This extends results of Fiedler et al. [PRL 98, 114101 (2007)], who demonstrated that such feedback control can stabilize the UPO associated with a two-dimensional subcritical Hopf normal form. Pyragas feedback requires an appropriate choice of a feedback gain matrix for stabilization,...

Source: http://arxiv.org/abs/1006.3479v1

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Sep 22, 2013
09/13

by
Claire M Postlethwaite; Jonathan H P Dawes

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We present two calculations for a class of robust homoclinic cycles with symmetry Z_n x Z_2^n, for which the sufficient conditions for asymptotic stability given by Krupa and Melbourne are not optimal. Firstly, we compute optimal conditions for asymptotic stability using transition matrix techniques which make explicit use of the geometry of the group action. Secondly, through an explicit computation of the global parts of the Poincare map near the cycle we show that, generically, the resonance...

Source: http://arxiv.org/abs/0906.4591v1

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Sep 21, 2013
09/13

by
J. H. P. Dawes; C. M. Postlethwaite; M. R. E. Proctor

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Through multiple-scales and symmetry arguments we derive a model set of amplitude equations describing the interaction of two steady-state pattern-forming instabilities, in the case that the wavelengths of the instabilities are nearly in the ratio 1:2. In the case of exact 1:2 resonance the amplitude equations are ODEs; here they are PDEs. We discuss the stability of spatially-periodic solutions to long-wavelength disturbances. By including these modulational effects we are able to explore the...

Source: http://arxiv.org/abs/nlin/0311045v1

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Oct 23, 2014
10/14

by
Tang, Bo; Kim, Seunghyun; Hammond, Sarah; Cullins, David L; Brand, David D; Rosloniec, Edward F; Stuart, John M; Postlethwaite, Arnold E; Kang, Andrew H; Myers, Linda K

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This article is from Arthritis Research & Therapy , volume 16 . Abstract Introduction: T cells orchestrate joint inflammation in rheumatoid arthritis (RA), yet they are difficult to study due to the small numbers of antigen-specific cells. The goal of this study was to characterize a new humanized model of autoimmune arthritis and to describe the phenotypic and functional changes that occur in autoimmune T cells following the induction of pathological events. Methods: We developed a double...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3978884

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59

Oct 29, 2014
10/14

by
Slominski, Andrzej; Kim, Tae-Kang; Zmijewski, Michal A.; Janjetovic, Zorica; Li, Wei; Chen, Jianjun; Kusniatsova, Ekaterina I.; Semak, Igor; Postlethwaite, Arnold; Miller, Duane D.; Zjawiony, Jordan K.; Tuckey, Robert C.

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This article is from Dermato-endocrinology , volume 5 . Abstract Novel metabolic pathways initiated by the enzymatic action of CYP11A1 on 7DHC (7-dehydrocholesterol), ergosterol, vitamins D3 and D2 were characterized with help of chemical synthesis, UV and mass spectrometry and NMR analyses. The first pathway follows the sequence 7DHC→22(OH)7DHC → 20,22(OH)27DHC → 7DHP (7-dehydropregnenolone), which can further be metabolized by steroidogenic enzymes. The resulting 5,7-dienes can be...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3897599

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Jan 5, 2018
01/18

by
Adam Freeland; Angel Feat The Rub; Ani DiFranco; Anti-Flag; Banco De Gaia; Brad Postlethwaite; Carpetface Feat Freefall Collective; Faithless; GM Baby Feat Suparnovar; Gertrude; Ghetto Priest; Hamell On Trial; Jane's Addiction; Jurassic 5 Feat Babu; Karma'Sutra; Le Tigre; Lifesavas; Liquid Blue; Lyrics Born Feat. Lateef The Truth Speaker; Martha Tilston; Maya Jupiter; Michael Franti & Spearhead Feat Gift Of Gab & Radioactive; Paris; Propagandhi; Rawdog Feat Taskforce And Braintax; Robb Johnson; Rub; Sara Marlowe; Saritah; Son Of Nun; Sonic Youth; The Evens; The Herd; The Kelly Gang; The Unpeople; Train Of Thoughts; Visionary Underground

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No Barcode Tracklist: Disc 1: 1. We Don't Stop - Michael Franti & Spearhead Feat Gift Of Gab & Radioactive 2. Ducky Boy - Jurassic 5 Feat Babu 3. The Last Trumpet - Lyrics Born Feat. Lateef The Truth Speaker 4. Mass Destruction - Faithless 5. What Would You Do? - Paris 6. Arrest The President - Rawdog Feat Taskforce And Braintax 7. What For? - Maya Jupiter 8. Countries At War - Visionary Underground 9. State Of The World - Lifesavas 10. We Want Your Soul - Adam Freeland 11. Starship...

Topic: Compilation

Source: CD